Fire Safety Science Digital Archive

Seven similarity numbers are given by this paper to describe the ignition process of combustible materials. Analysis points out that it is absolutely impossible to predict real-process from small-scale simulating test in which the same material is used. Small-scale accurate simulating test should be done only by using different materials with the same similarity numbers. But if convective heat transfer and/or buoyancy force are negleted , it is also possible to use the same material in the small-sacle test by changing the scale of velosity Vo.